Detect the 5th-generation AST 1400. Allows to simplify the code
for widescreen support.
Signed-off-by: Thomas Zimmermann <tzimmermann@xxxxxxx>
---
drivers/gpu/drm/ast/ast_drv.h | 2 +-
drivers/gpu/drm/ast/ast_main.c | 14 ++++++++++----
2 files changed, 11 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/ast/ast_drv.h b/drivers/gpu/drm/ast/ast_drv.h
index e3f82c7a823e4..ef69a1535695b 100644
--- a/drivers/gpu/drm/ast/ast_drv.h
+++ b/drivers/gpu/drm/ast/ast_drv.h
@@ -74,7 +74,7 @@ enum ast_chip {
AST1050 = __AST_CHIP(4, 2), // unused
/* 5th gen */
AST2400 = __AST_CHIP(5, 0),
- AST1400 = __AST_CHIP(5, 1), // unused
+ AST1400 = __AST_CHIP(5, 1),
AST1250 = __AST_CHIP(5, 2), // unused
/* 6th gen */
AST2500 = __AST_CHIP(6, 0),
diff --git a/drivers/gpu/drm/ast/ast_main.c b/drivers/gpu/drm/ast/ast_main.c
index bf8606301ab26..72543e97f3586 100644
--- a/drivers/gpu/drm/ast/ast_main.c
+++ b/drivers/gpu/drm/ast/ast_main.c
@@ -167,8 +167,15 @@ static int ast_detect_chip(struct drm_device *dev, bool need_post, u32 scu_rev)
ast->chip = AST2500;
drm_info(dev, "AST 2500 detected\n");
} else if (pdev->revision >= 0x30) {
- ast->chip = AST2400;
- drm_info(dev, "AST 2400 detected\n");
+ switch (scu_rev & 0x300) {
+ case 0x0100:
+ ast->chip = AST1400;
+ drm_info(dev, "AST 1400 detected\n");
+ break;
+ default:
+ ast->chip = AST2400;
+ drm_info(dev, "AST 2400 detected\n");
+ }
} else if (pdev->revision >= 0x20) {
switch (scu_rev & 0x300) {
case 0x0000:
@@ -219,8 +226,7 @@ static int ast_detect_chip(struct drm_device *dev, bool need_post, u32 scu_rev)
ast->support_wide_screen = false;
if (ast->chip == AST1300)
ast->support_wide_screen = true;
- if (ast->chip == AST2400 &&
- (scu_rev & 0x300) == 0x100) /* ast1400 */
+ if (ast->chip == AST1400)
ast->support_wide_screen = true;
if (ast->chip == AST2500 &&
scu_rev == 0x100) /* ast2510 */
--
2.41.0
